feat: Update drag page and other small things

- Add parameter to NewDiv class
- Add instance with content to drag page
- Drag page now also uses frame template
- Use macro for footer in explorer

source/code/_ui.js

@@ -1,17 +1,18 @@
 // Creates a div element which is draggable
 class NewDiv {
-  constructor(x, y, width, height, backgroundColor) {
+  constructor(x, y, width, height, backgroundColor, content) {
     this.x = x;
     this.y = y;
     this.width = width;
     this.height = height;
     this.backgroundColor = backgroundColor;
     this.element = null;
+    this.content = content;
   }
 
   // Create the div element
   createDiv() {
-    this.element = document.createElement('div');
+    this.element = this._content;
     this.element.style.position = 'absolute';
     this.element.style.left = `${this.x}px`;
     this.element.style.top = `${this.y}px`;
@@ -93,6 +94,19 @@ class NewDiv {
     loadData();
   }
 
+  // FIXME: this.element wird von appendToFrame() verwendet
+  get content() {
+    return this._content = this.content;
+  }
+
+  set content(value) {
+    if (!value) {
+      value = document.createElement('div');
+    }
+
+    this._content = value;
+  }
+
   // Append the div to the space
   appendToFrame(space) {
     this.element.id = `newDiv${space.children.length}`;